Dual wielding will shred bosses with the right build but you're predominantly dodge-rolling. It's a fun way to play. To ease into DS3 I'd recommend using a shield. Armor in the game is fluff, the stats don't really matter. So if you're struggling with dodge timing then armor isn't going to save you. This is a pretty big departure from DS1 and DS2, it's a lot more like Bloodborne where armor was for fashion. If you need/want defense then you want to get behind a shield. Greatshield and a 1-hander is a viable first time build to pretty much handle anything. The Darkblade and Axes are solid choices because they can stagger lock. I find it boring to have to R1 spam so I lean towards heavier hits with the Greatswords. The Claymore is great because the backstab and expose attacks do quick/heavy damage. Most of what you're going to end up doing with mob-enemies is backstab fishing. If you're not doing it now - start practicing. Over time you'll be able to "aim" your roll through an attack and land at the opponent's back for a backstab punish. Or you can bait their attack and circle flank. Quite thrilling. Anyway best of luck. DS3 is fairly linear but with a ton of optional content. My advice is to take it slow. I'd also highly recommend completing Seigward's questline. It's not exactly obvious how to do so, so research at your own peril but it makes for a great cinematic later on. And don't kill Patches.